Question about Heating & Cooling

1 Answer

HVAC will not turn on

My air conditioning unit will not turn on. The technician that came out said that the freon was only half full and he found a small leak outside. Can this be the cause of the unit not turning on at all? It wouldn't blow any air. I have had 5 service calls in the past 6 months for the upstairs and downstairs units not coming on when they should. The technicians that respond are all from the same company and are answering a call for a warranty company. They have told me they couldn't find anything wrong until this call. When the heat wouldn't come on periodically they found nothing that would cause it.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 8,205 Answers

If the freon pressure gets low then the low pressure cutout switch kills the low voltage to the thermostat and the unit will not run.

Posted on Mar 12, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My corona air conditioner inverter does not produce hot air


these are all in one units, some of them are made like smaller central units and some of these are separate ac and heat units. the heat in the separate ones is run off of a heat strip in the unit it's self the ones that are made like a central unit reverse the flow of the freon in the system to draw the heat from outside. this is not something you can repair very easily yourself. most places require because of the freon that you have a certified HVAC technician to work on them.

Feb 22, 2013 | Heating & Cooling

1 Answer

How do i recharge freon for me Friedrich KM18J30A-3 window unit?


only a certified HVAC technician has the license to carry and use the freon used in home A/C units. it's not like the car units we can do ourselves.

Jul 14, 2012 | Friedrich QuietMaster KM18L30 Wall/Window...

1 Answer

How do I recharge the freon in my unit? model is 38CKB060300


Hello, freon should be charged by a hvac technician with a epa card. But the way you charge it in is hook up the manifold gauges to the unit tjen take the yellow and hook it up to your refrigerant bottle. If this is a R-22 unit then you add vapor refrigerant to the low side of the system untill your superheat is correct if it is a fixed orifice system, however if it is a txv system then you chek the subooling. If it is a 410a system then the same principle applies however you flip the cylinder upside down and add liquid refrigerant through the low side a little at a time here is a link that shows you proper charging methods http://www.air-conditioning-and-refrigeration-guide.com/charging-air-conditioning-systems.html.

May 27, 2011 | Carrier 38CKC036 Air Conditioner

1 Answer

My Amanda wall unit keeps freezing up. Cleaned filter and coils, please advise. Thanks, Gilbert


If a AC unit starts to freeze up, then that is a sure sign that it is low on freon. A wall unit is harder to add freon to since those units generally do not have Shrader valves to purge or add freon. It is sort of like your refridgerator in that the freon is sealed in the factory and to add , a technician has to cut the evaporator tube and add a valve, then add freon, pinch the tube off and seal it once the correct pressure is adjusted.

I would say that somehow your unit has developed a leak, and will get worse.

see:http://real-estate-agents.com/tips/hvac/maintain-air-conditioner/

Jan 23, 2011 | Amana PTC123B35AE Air Conditioner

2 Answers

Mercedes C320 air conditioning not working, freon shows full, compressor is working, what else can I check?


The refrigeration system in all vehicles should be repaired by a certified HVAC technician or equilavent. Dealing with R134A the refrigerant used in your vehicle is dangerous. The electrical checks to determine the repair are difficult and depending on what the problem is are costly and may involve removing the refrigerant with special machinery
to replace a sensor or major item in the system.
Lastly in most states its illegal to purchase refrigerants and /or render repairs on a/c systems without the proper certifications.
In your case it appears that the blend doors or blower motors are not working because you stated in your write up that compressor is on and refrigerant is a-ok.
Have a technician check this out. May have to remove dash board to do testing. This is money well spent.

Apr 09, 2010 | 2002 Mercedes-Benz C-Class

1 Answer

How do i get the freeon in the ac its not getting cold


Air Conditioners don't 'Use' freon per se. A common fallacy is the thinking that if "It's not getting cold, then it needs freon." If your unit lost freon, it has a leak and adding freon will only be a very short term fix.

If you're certain that you need freon, you'll have to take the unit to a certified HVAC technician. EPA regulations make it nearly impossible for the average handyman to service A/C units, since the freon must be handled in a very specific way with equipment not generally available to the average owner, was well as R-12 freon gas which can be bought only by licensed HVAC technicians.

However, there are many other problems that are far more likely to be the cause of no cooling than loss of freon. It could be something as simple as dirty condenser coils (you'd be surprised how common it is that a simple cleaning of these coils will 'fix' a non-working window A/C), to a defective thermostat switch, to other defective switches/controls.

Unless it's a very obvious leak, I always suspect a loss of freon LAST on my list of possible cause of non-cooling in these units.

Jun 28, 2009 | Goldstar R5050 Air Conditioner

2 Answers

Dometic duo therm does not cool or heat...


it should never have to be recharged unless there is a leak. so you should isolate the leak with dye injectable into the system w/ the freon and correct it, then fully recharge system.

Jun 09, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

2004 Ford Crown Victoria no air flow through main air vents


Chances are the electronic/digital HVAC control unit is bad. This same problem happened to me and I had to replace the entire unit. The dealer wanted to charge $800 for just the part! After I freaked out on them, they found a used one for less than half. Sorry, but there's no easy fix here.

Jun 26, 2008 | 2004 Ford Crown Victoria

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

117 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

paulcarew

Level 3 Expert

2398 Answers

Dan Webster
Dan Webster

Level 3 Expert

8205 Answers

Donni Steen

Level 3 Expert

659 Answers

Are you a Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...